word | | Terrain |
| mountains | Panama | interior mostly steep, rugged mountains and dissected, upland plains; coastal areas largely plains and rolling hills |
| mountains | Papua New Guinea | mostly mountains with coastal lowlands and rolling foothills |
| mountains | Philippines | mostly mountains with narrow to extensive coastal lowlands |
| mountains | Poland | mostly flat plain; mountains along southern border |
| mountains | Puerto Rico | mostly mountains with coastal plain belt in north; mountains precipitous to sea on west coast; sandy beaches along most coastal areas |
| Mountains | Romania | central Transylvanian Basin is separated from the Moldavian Plateau on the east by the Eastern Carpathian Mountains and separated from the Walachian Plain on the south by the Transylvanian Alps |
| mountains | Russia | broad plain with low hills west of Urals; vast coniferous forest and tundra in Siberia; uplands and mountains along southern border regions |
| mountains | Samoa | two main islands (Savaii, Upolu) and several smaller islands and uninhabited islets; narrow coastal plain with volcanic, rocky, rugged mountains in interior |
| mountains | San Marino | rugged mountains |
| mountains | Serbia | extremely varied; to the north, rich fertile plains; to the east, limestone ranges and basins; to the southeast, ancient mountains and hills |
| mountains | Sierra Leone | coastal belt of mangrove swamps, wooded hill country, upland plateau, mountains in east |
| mountains | Slovakia | rugged mountains in the central and northern part and lowlands in the south |
| mountains | Slovenia | a short coastal strip on the Adriatic, an alpine mountain region adjacent to Italy and Austria, mixed mountains and valleys with numerous rivers to the east |
| mountains | Solomon Islands | mostly rugged mountains with some low coral atolls |